September 27
William the Conqueror Sets Sail for England
After weeks of adverse winds holding his invasion force at the Somme estuary, Duke William of Normandy finally ordered his fleet of hundreds of ships to sea on the evening of September 27, 1066, launching the campaign that would end Anglo-Saxon rule in England.
Summary
In the mid-11th century, England faced a succession crisis after the death of Edward the Confessor, with competing claims from Harold Godwinson, Harald Hardrada of Norway, and William, Duke of Normandy. William had received papal support for his claim and prepared an invasion force across the Channel. On September 27, after weeks of unfavorable winds, William's fleet of around 700 ships departed from the mouth of the Somme River in northern France. The Norman army landed at Pevensey on the southeastern English coast shortly thereafter. This departure initiated the Norman Conquest, leading to the decisive Battle of Hastings weeks later and the establishment of Norman rule in England.
Context
The death of King Edward the Confessor in January 1066 left England without a clear heir and triggered competing claims to the throne. Edward's brother-in-law Harold Godwinson was crowned king almost immediately, but William, Duke of Normandy, asserted that Edward had earlier promised him the succession and that Harold had sworn an oath supporting that claim. A third contender, Harald Hardrada of Norway, also advanced a hereditary argument based on earlier Scandinavian ties to the English crown.
What Happened
Throughout the summer William assembled an army drawn from Normandy, Brittany, Flanders, and other regions, together with a fleet estimated at around seven hundred vessels. The force gathered first at the mouth of the Dives River and later moved to Saint-Valery-sur-Somme after storms scattered the ships. Adverse winds and the need to keep Harold's coastal defenses in place delayed departure until late September. On the 27th the wind finally shifted to the south. Late in the afternoon William boarded his flagship, the Mora, and the fleet slipped out of the estuary under cover of darkness, guided by lanterns on the masts.
Aftermath
The crossing took the night; the leading ships reached Pevensey Bay on the Sussex coast the following morning. William's troops quickly secured the area, constructed a wooden castle at Hastings, and began foraging raids to supply the army while awaiting Harold's response. Harold, having just defeated and killed Hardrada at the Battle of Stamford Bridge on 25 September, turned his weary forces south and confronted the Normans at Hastings on 14 October.
Legacy
William's victory at Hastings and subsequent coronation on Christmas Day 1066 replaced the Anglo-Saxon aristocracy with Norman lords and introduced continental feudal practices, French legal terminology, and a new ruling class. The Conquest forged stronger political and cultural links between England and the Continent that endured for centuries and fundamentally altered the development of the English language, governance, and landholding system.
Why It Matters
The sailing marked the beginning of the Norman Conquest, which reshaped English society, law, language, and governance by integrating Norman feudal structures and French influences. It established a lasting connection between England and continental Europe, influencing the development of the English monarchy and aristocracy for centuries.
Related Questions
Why did William claim the English throne?
William argued that Edward the Confessor had promised him the crown years earlier and that Harold Godwinson had sworn an oath to support that promise.
How large was William's invasion fleet?
Contemporary estimates vary, but historians generally accept a figure of roughly 700 ships carrying several thousand soldiers, archers, and cavalry.
Where did the Norman fleet actually depart from?
After earlier plans at the Dives River were disrupted by weather, the fleet assembled and sailed from Saint-Valery-sur-Somme at the mouth of the Somme River.
What happened immediately after the landing?
The Normans secured Pevensey, marched a short distance to Hastings, built a castle, and raided the countryside to provision their army while Harold marched south to meet them.
How did the timing of the Norwegian invasion affect William's chances?
Harald Hardrada's attack in the north forced Harold to fight two major battles in quick succession, leaving his army exhausted and far from the south coast when William landed.
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US Military Atlas: William the Conqueror Sets Sail for England connects to military history, war consequences, or postwar diplomacy.
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Sources
- September 27 - Wikipedia, Wikimedia Foundation. Accessed 2026-07-05.
- Norman Conquest - Britannica, Encyclopædia Britannica. Accessed 2026-07-05.